Process of blowing acid gases.



R. B. WOLF. PROCESS OF BLOWING ACID GASES.

APPLICATION FILED JAN. 28, 1911.

1,097,783. Patented y 26, 1914.

sans

ROBERT B. WOLF, OF BERLIN, NEW' HAMPSHIRE, ASSIGNOR TO BURGESQS SULPHIIEFIBRE 60., OF PORTLAND, MAINE, A CORPORATION F MAINE.

PROCESS OF BLOWING ACID GASES.

Specification of Letters Patent.

Original application filed November 17v 1909, Serial No. 523,44etllivided and this a pnlieation filed January 28, 1911. Serial No.605,241.

. shire, have invented certain new and useful Improvements in Processesof Blowiuc- Acid Gases, of which the following is a spcenica tion.

This invention relates to the handling of gases and particularly to theforcingorhloiw mg of a gas such as that employed in the acid system of asultite plant. In order to make clear the demands of actual practice,and to illustrate the uses of my blower in sittch practice, I shallparticularly discuss it iii connection with an acid s stem.

In the production of the acid to he used in a. sulfite process it hasbeen very much desired to handle the sulfur dioxid for the acid undermore than atmospheric prcure. In my previous application. Serial Nuiuher528;l-l4t, of which this application is a divi- SlO11,Il1Z1V disclosedand discussed at length a cou'lplete apparatus 'tor an acid sy temhaving this feature among others. ln this system it is found of: greatadvantage to handle the gas hr a blower interposed l.=etween theburners. or, more spuritically. hc-- twehn the coolers and the acidclninihcrs.

$0, The action of the, acid. however, upon an) ordinary material ofwhich a blower could be practically con trmted so great as to render theu e ol' a lilowcr of ordinau couisl'ruction impossilile. "lfo this end,therefore,

51 have devised in) process which inahes it possible for me to:(fttll'tf the cli'ects desired in my system and similar terns withoutany undue aition by the as on the parts of the a pharatus which wouldotl'ieru'ise he sub- JQ jeet toilustruetioit by the gas. In the presentcase. I show the proper handling of the gas by certain form of blowerand fittings which Iilhavh found advantageous in practical use, theshine being'hnore fully described in the specification whitih follows. 7

i In order to make clear my process and as ilrustrative 015 myiuvehtioin 1 haveshown intthe accom anying drawings the general fol lnof cons ruction which found to be 5 0 extremely ei'ricient in actual use'l ltroughont speoilicat ion and d ravvings lilte reference numeitaisare employed to indicate dorrtrr gunnlingparts and in the drawings havcsh'ownl'partly in section and 55 partly in elevation, it blower and itsfittings,

with so much oi the gas end of the system as is iulossn rv for anunderstanding of the acti u ol' the blower.

it (u ing t provided within whicn imiellcrs ll are rotatahly mounted onshafts 7. so r ul'l'ur dioxid is drawn into this casing from a cooler 53to which the gas comes, through a pipe 2, from the burners .l. 'lhe pipeit is connected hv a heat foot. 10 at; the lower side of the hlowe a ml,at about. the point of conmotion, the pipe 18 is led off to the acidchamhe. 1

Within the upright pipe 11 is rotatably' mounted a shaft 12, providedwit uitable stirrers. and at its top the pipe is provided '10 with aspill way 1.5, from which the liquid" may pass of? through a pipe 16.

The blower casing in provided with a spray nozzle 8 fed from a. tank 8which, in the system cited, would contain -fresh lime 75. water. Theblower is; therefore sprayed internally with a fine spray of lime waterwhich maintains within the blower casing and on the impellers 6 acoating l of calcium. lllfillfistlll lit which, upon lXllCl'OSCOPlCuvaiuination. is shown to or in fine crystalline 'l'ornr the er :a lsbeing in the tetragonal system with one long and two short axes.

the blower is. there ore. lined and coatedwith a layer oi a gn'otectivenature which prevents any action i the acid gas on it.

llith the ahovc illustrai'te ot' the apparatus thus dcscrihcd, it willbe seen that my t'octrs is continued in the following' manner: The gasis drawn from the lnirners 1 the impellers l3. ltere. within the hiowercasing l l introduce a fine spray of lime water r null; oi time, thusforming vl'ithin the casing calcium inonor-ndtite which deposits uponthe ilnpellc and casing in fine cr -'st:alline form, ,lornliug thecoatini 9 as above leseribed. From the casing -1t the gas is deliveredunder pr s; ire passing in the form shown, through the pipe 18, to theabsorption system, the liquid separating itself by gravity and fallinginto the bent foot- 10 from which it rises to the upright pipe 11 andunder the intluence of the agitator ti spills oil" through the'top ofthe pipe 1]. and the. spillway 15 through the pipe 16 to any suitabletank where it may be pre- 7 served for subsequent use. It will,therelore, be seen that the essential steps of my process con t in.introducing a neutralizing agent into the gases for the pnrposeof denobositin an inactive coatin u on the me dium through which the gas isforced and which would otherwise be attacked.

-Vnrious forms'of forcing and blowingap pnratus may, of course, be usedand the new trnlizing agent may, of course, be varied in accordance withthe peculiarities of the gas which is to be handled, all without deparbing from the spirit of my invention if with in the limits of thenpFcnded claims.

Whznt I, therefore, c aim and desire to so cure by Letters Patcnt1.]1Ihe process of blowing gases containfor the purpose of depositing aninactive coating on the blower.

'3. The process of blowing gases contain ing S0 which consists indrawing the into the blower and introducing a mi of-- lime into the gasas it enters the blower for the purpose of depositing an'inactive coat--ing on the blower and finally delivering the gas therefrom.

4, The process of forcing gases under pressure containing corrosiveconstituents, which consists in drawing the gases into the forcingmedium and introducing a neutraliz' ingagent into the gas at the ,tirneof contact with the forcing medium for the purpose of depositing aninactive coating thereon and finally delivering the gas therefrom] Intestimony whereof,1 ufiix my signature in'prcsencc of two witnesses.

' ROBERT B. WOLF. "i'ritnesses (Llrrnnnns A. MARTIN, Gnome Ronrscnmr.

